Angelic Bounty Hunter Angela

Angelic bounty hunter Angela is a character in Todd McFarlane's Spawn comic book series.
Even though Spawn was created by McFarlane, Angela was created for the series by Neil Gaiman. This (of course) later led to a legal battle between McFarlane and Gaiman over the rights to her.
Currently the rights to the character are split 50/50 between McFarlane and Gaiman.

Angela is an angel who acts opposite Spawn as a bounty hunter working for Heaven.
She attempted to kill Spawn the first time they met (in Spawn #9), but he managed to defeat her despite the fact that she had greater fighting experience.

Angela has made appearances in other Spawn projects including the 1997 Spawn live action movie (Played by Laura Stepp. During the business party, a woman in a green dress is seen, wearing earrings bearing the Spawn emblem). She also appeared in the animated HBO series Todd McFarlane's Spawn and the Shadows of Spawn manga series.

She also had her own 3 issue mini series, written by Neil Gaiman and appeared in her own one shot comic as well.

Besides Spawn, Angela has crossed over with Glory (she's kinda like Wonder Woman in the Image universe) and Aria (Kildare meets Angela in London at the end of the 19th century).